New PrimaLuna versus used Audio Research preamp?

As posted previously, I'm shopping tube preamps.

Have an opportunity to buy a friend's ARC Reference 5SE, as he upgraded to a new 6SE.

Alternatively, a new PL EVO 300 or 400 is also on my radar, and even new would cost 20% to 30% less than the used 5SE.

Anyone here experience both units and brands?

Thanks!